Photo Researchers ftp March 2011

Londoners fleeing plague. 1630

Color enhanced double portrait of Pierre-Joseph Desault (1738-1795), French surgeon, anatomist and teacher.

Color enhanced portrait of William Hunter (1718-1783), Scottish anatomist and physician. Together with his brother, John Hunter, he founded the first...

Color enhanced historical illustration of surgical tools.

An illustration of Mandrake.

Early example of studio (1700s) for the study and classification of taxidermy.

Franz Boas, (July 9, 1858 - December 21, 1942) a German-American anthropologist and a pioneer of modern anthropology. He has been called the "Father o...

God painting the Zodiac signs: astrology was integrated within Christianity by the theory that God used the stars and planets as intermediaries to gov...

Jons Jakob Berzelius (1779-1848), Swedish chemist. He was expert at blowpipe analysis and discovered several elements while carrying out analyses. He...

Jean-Pierre Blanchard (1753 -1809), aka Jean Pierre Fran?ois Blanchard, was a French inventor. He is most remembered as a pioneer in aviation and ball...

Augustin Pyrame de Candolle. (1778-1841). Candolle is most famous for his Elementary Theory of Botany, which he published in 1813. In this he extended...

Albert Einstein (1879-1955).

An illustration of Pennyroyal.

An illustration of Pennyroyal.

An illustration of Pennyroyal.

An illustration of Mandrake.

An illustration of Mandrake.

An illustration of Mandrake.

Early example of studio (1700s) for the study and classification of taxidermy.

Early example of studio (1700s) for the study and classification of taxidermy.

Franz Boas, (July 9, 1858 - December 21, 1942) a German-American anthropologist and a pioneer of modern anthropology. He has been called the "Father o...

Franz Boas, (July 9, 1858 - December 21, 1942) a German-American anthropologist and a pioneer of modern anthropology. He has been called the "Father o...

God painting the Zodiac signs: astrology was integrated within Christianity by the theory that God used the stars and planets as intermediaries to gov...

God painting the Zodiac signs: astrology was integrated within Christianity by the theory that God used the stars and planets as intermediaries to gov...

God painting the Zodiac signs: astrology was integrated within Christianity by the theory that God used the stars and planets as intermediaries to gov...

Jons Jakob Berzelius (1779-1848), Swedish chemist. He was expert at blowpipe analysis and discovered several elements while carrying out analyses. He...

Jons Jakob Berzelius (1779-1848), Swedish chemist. He was expert at blowpipe analysis and discovered several elements while carrying out analyses. He...

Jean-Pierre Blanchard (1753 -1809), aka Jean Pierre Fran?ois Blanchard, was a French inventor. He is most remembered as a pioneer in aviation and ball...

Jean-Pierre Blanchard (1753 -1809), aka Jean Pierre Fran?ois Blanchard, was a French inventor. He is most remembered as a pioneer in aviation and ball...

Louis Bleriot was a French aviator, inventor and engineer. In 1909 he completed the first flight across a large body of water in a heavier-than-air cr...

Augustin Pyrame de Candolle. (1778-1841). Candolle is most famous for his Elementary Theory of Botany, which he published in 1813. In this he extended...

Augustin Pyrame de Candolle. (1778-1841). Candolle is most famous for his Elementary Theory of Botany, which he published in 1813. In this he extended...

"A man is being made". Medieval engraving depicting alchemy and creation.

"A man is being made". Medieval engraving depicting alchemy and creation.

Astronomical clock at the United States Naval Observatory, Washington.

Astronomical clock at the United States Naval Observatory, Washington.

Booker T. Washington (April 5, 1856 - November 14, 1915), American Civil Rights leader.

George Boole (1815 - 1864), British mathematician. A largely self-taught schoolteacher who eventually became a professor of mathematics at Queen's Col...

George Boole (1815 - 1864), British mathematician. A largely self-taught schoolteacher who eventually became a professor of mathematics at Queen's Col...

An 1869 engraving depicting African American slaves using a cotton gin.

Thomas Edison (1847-1931) in his laboratory in 1904.

Thomas Edison (1847-1931) in his laboratory in 1904.

Francois Magendie (1783-1855), French physiologist best known for describing the foramen of Magendie.

Francois Magendie (1783-1855), French physiologist best known for describing the foramen of Magendie.

Guglielmo Marconi (April 25, 1874 - July 20, 1937), Italian inventor best known for his development of a wireless telegraph system which led to modern...

Guglielmo Marconi (April 25, 1874 - July 20, 1937), Italian inventor best known for his development of a radio telegraph system which led to modern ra...

Bust of Charles Darwin on display at the New York Academy of Sciences, of which Darwin was a member; New York City.

A page from a draft of Charles Darwin's book, The Descent of Man and Selection in Relation to Sex, published in 1871.

Caricature from of T.H. Huxley, a famous biologist and proponent of Darwin's theory of evolution; Vanity Fair, 1871. Huxley called himself "Darwin's b...

"Evidence as to Man's Place in Nature", a book on evolutionary theory by T.H. Huxley, published in 1863.